I’m at the point where I get bugged if I have to write Objective-C code.

...

Writing Swift code feels like driving a hot rod. Sometimes it feels like driving a hot rod into a brick wall. But still: it’s a goddamn hot rod.

Objective-C was (is) great. Swift is greatER. I write both languages almost every day, and I greatly prefer Swift. As Brent points out, sometimes it feels like you get the rugged pulled out from under you, but on the whole writing in Swift feels fantastic and efficient.